building an office

Whether you intend it or not, the possibility that the roof surface of this office will be used for storage can't be ruled out. This, in turn, could mean that, sooner or later, it may be bearing the weight of a person. This may influence your choice of materials, and mode of construction. ;-)

Timbert is cheap.

Make em braced 6x3 so you can safely walk on top.

Personally I don't think a lort of hangars. A lot easier top get some expandintg bolts and really solidly fix a lump of 6x3 (not a batten) to ehwall and mount off that...and you can dry line the inside with more

You may also want it to be sound-proofed, so that noise / trucks etc in the warehouse will not mean you cannot talk on the phone in the office. I've been in several of these types of office, and often the noise if awful. But I suppose you warehouse could be storing cotton wool distributed by grannies in slippers ! Simon.

I know a warehouse exactly like that (Croft fabrics). It's a hellishly noisy place, because the team of deaf grannies spend their days listening to Radio Chav at full blast, having been deafened by a youth working in mills and sewing rooms.

Check your rules for fireproofing before you start. If it's commercial premises there'll be a bloke in a tin hat to satisfy, or else your insurers won't like it.

They should never have hired him.

Joist hangers are best used when they beam is fitted in very tight, one end of yours is free to move as the wall may wobble.

I would go for much bigger timber, I remember loading up the roof of an office like the one you describe, untill sombody pointed out what the walls were made of. Very rapidly we got the stuff down again.

Rick